20304304 has 20 divisors (see below), whose sum is σ = 39411664. Its totient is φ = 10133568.

The previous prime is 20304289. The next prime is 20304311. The reversal of 20304304 is 40340302.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13309 + ... + 14755.

Almost surely, 2^20304304 is an apocalyptic number.

It is an amenable number.

20304304 is a deficient number, since it is larger than the sum of its proper divisors (19107360).

20304304 is a wasteful number, since it uses less digits than its factorization.

20304304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332 (or 2326 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 20304304 is about 4506.0297380288. The cubic root of 20304304 is about 272.8115181625.

Adding to 20304304 its reverse (40340302), we get a palindrome (60644606).

The spelling of 20304304 in words is "twenty million, three hundred four thousand, three hundred four".